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Re: Pipe miter cut help

the easy way is by the book. the hard way is to. . . .

45s are easy. call the long side of your cut 0. since it is a 45 deg cut, (1:1) we know that the short side will be 6 5/8" shorter than zero. so if you punch-mark zero, and go 180 deg from that mark (1/2 the pipe circumference), and make a mark 6 5/8" shorter, you have a baseline. then you can go to marks half of half the circumference (1/4's), and make length marks half the difference between 0 and 6 5/8" (3 5/16").

follow that pattern until you are comfortable connecting the dots! on 6" pipe you may section the circumference into 16ths to get accurate marks. i find that a cuttoff wheel makes cutting easier, and the bigger, the better. you can easily see the "plane" that a 6" wheel will cut vs a skinny little porta-band blade which will do all sorts of weird stuff when trying to cut miters.

Re: Pipe miter cut help

Blocker, that looks pretty slick. I may have to look into one!

92dlxman, thanks I appreciate the idea. Once TimmyTig cured me of the stupids I was able to get it knocked out pretty easily with my torch. The cuts came out almost perfect, wish I could say the same for my welds though. Never have made a 5G cap that I was proud of, but I don't weld pipe often enough to get much practice.

Re: Pipe miter cut help

I have never welded pipe or tube so bare with me as I learn. I am under the impression that pipe is measured by the inside diameter while tube is measured by the outside diameter. What am I missing here. Do things change after a certain size of pipe?

Re: Pipe miter cut help

just take a look at this video in the first post...the guy explains it great...and you will have to get your hands on the blue book to get the numbers but this is how its done.... you don't put 30 foot lenths of 6"pipe into a bandsaw unless you have one hell of an overhead in your shop!!

Re: Pipe miter cut help

Since it doesn't show my OD size will using the numbers for a 6" OD throw it way off? I had a hard time finding a free printable template that would accept the dimensions. ...

Thank you.

Man, I'm hurt. This tubenotcher software will definitely handle 6" or larger pipe. You will print onto 8.5x11" paper, and have to use a little bit of scotch tape to make a large pattern out of small paper, but it works pretty well. You will be using Adobe Acrobat Reader with the Poster Option. I'm the author of that software, and I worked really hard to make that work on 6" pipe.

Its not clear on if you are cutting a 45 degree miter to another pipe, or cutting a 45 degree miter to mate to a flat plate (or another tube with the exact same cut...) . My software will do either. (Miter to other tube = Simple Tab, miter to 45 degree flat surface = Round to Flat Tab) .

Here is me doing an angled cut on a 3" tube on my Portaband saw. And the template for that cut is definitely more than three or four sheets of paper... I used a black felt tip pen to copy the cutting line to the steel tube. I needed to reuse the pattern on a whole bunch of cuts.